Alright, so it's not all monstrous creatures. At some point i may take out elites for more but lets face it, the doom is pretty much doom, and the 5+ cover save for the monstrous creatures will probs be worth it.

I believe that hive tyrants are for assaulting my friend, assaulting with wings.
also, would take out the carnifexes to get some tervigons.
perhaps take out the genestealers? get a few gaunts and maybe a slip in another trygon?
THAT my friend would be MC madness.

no fexes!!!! I cannot believe how much better trygons are at doing their job, as for shooting, just get some zoanthropes in a pod, for nearly the same amount of points!
If I wanted stabby, well I myself would take about 180 hormogaunts, some shrikes with boneswords(slashy I know but deal with it), maybe some raveners, a flying stabby tyrant and 3 trygons, now that my friend is stabby.